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#ifndef PXG_COPY_MANAGER_H
#define PXG_COPY_MANAGER_H

#include "foundation/PxPinnedArray.h"
#include "cudamanager/PxCudaTypes.h"

#define COPY_KERNEL_WARPS_PER_BLOCK 4

namespace physx
{
	class PxCudaContextManager;
	class PxCudaContext;
	class KernelWrangler;
	class PxgHeapMemoryAllocatorManager;

class PxgCopyManager
{
	PX_NOCOPY(PxgCopyManager)
public:

	PX_ALIGN_PREFIX(16)
	struct CopyDesc
	{
		size_t		dest;
		size_t		source; 
		size_t		bytes;
		size_t		pad;

		PX_CUDA_CALLABLE void operator= (const CopyDesc& ref) volatile
		{
			dest = ref.dest;
			source = ref.source;
			bytes = ref.bytes;
		}
	} PX_ALIGN_SUFFIX(16);

public:

	PxgCopyManager(PxgHeapMemoryAllocatorManager* heapMemoryManager);
							
	~PxgCopyManager(){}

	void waitAndReset(PxCudaContext* cudaContext);
	void pushDeferredHtoD(const CopyDesc& desc);
	void dispatchCopy(CUstream stream, PxCudaContextManager* cudaContextManager, KernelWrangler* kernelWrangler);
	void createFinishedEvent(PxCudaContext* cudaContext);
	void destroyFinishedEvent(PxCudaContext* cudaContext);

protected:

	void resetUnsafe() { mNumDescriptors = 0; }
	bool hasFinishedCopying(PxCudaContext* cudaContext) const;
	
	PxInt8ArrayPinned				mDescriptorsQueue;
	PxU32							mNumDescriptors;
	CUevent							mFinishedEvent;
	bool							mEventRecorded;
	PxgHeapMemoryAllocatorManager*	mHeapMemoryManager;
};


}

#endif
